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For fate mapping experiments, often short time windows for reporter gene activation are preferred

Ex vivo studies using dissected hair follicle organ cultures allow researchers to observe the effects of GHK-Cu on the hair cycle itself, particularly its potential to prolong the anagen (growth) phase

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Oral supplements have also been shown to be effective at treating vitamin B12 deficiency

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So, if you're feeling unwell due to a deficiency, restoring B12 levels might help you feel well enough to eat normally, but it's not "making" you gain weight in an unhealthy way